windows/queue.c

   1 /* * Message queues related functions
   2  *
   3  * Copyright 1993, 1994 Alexandre Julliard
   4  */
   5
   6 #include <string.h>
   7 #include <signal.h>
   8 #include "wine/winbase16.h"
   9 #include "wine/winuser16.h"
  10 #include "miscemu.h"
  11 #include "module.h"
  12 #include "queue.h"
  13 #include "task.h"
  14 #include "win.h"
  15 #include "clipboard.h"
  16 #include "hook.h"
  17 #include "heap.h"
  18 #include "thread.h"
  19 #include "process.h"
  20 #include <assert.h>
  21 #include "debug.h"
  22 #include "spy.h"
  23
  24 DECLARE_DEBUG_CHANNEL(msg)
  25 DECLARE_DEBUG_CHANNEL(sendmsg)
  26
  27 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  28
  29 static HQUEUE16 hFirstQueue = 0;
  30 static HQUEUE16 hExitingQueue = 0;
  31 static HQUEUE16 hmemSysMsgQueue = 0;
  32 static MESSAGEQUEUE *sysMsgQueue = NULL;
  33 static PERQUEUEDATA *pQDataWin16 = NULL;  /* Global perQData for Win16 tasks */
  34
  35 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  36 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  37
  38 HQUEUE16 hCursorQueue = 0;
  39 HQUEUE16 hActiveQueue = 0;
  40
  41
  42 /***********************************************************************
  43  *           PERQDATA_CreateInstance
  44  *
  45  * Creates an instance of a reference counted PERQUEUEDATA element
  46  * for the message queue. perQData is stored globally for 16 bit tasks.
  47  *
  48  * Note: We don't implement perQdata exactly the same way Windows does.
  49  * Each perQData element is reference counted since it may be potentially
  50  * shared by multiple message Queues (via AttachThreadInput).
  51  * We only store the current values for Active, Capture and focus windows
  52  * currently.
  53  */
  54 PERQUEUEDATA * PERQDATA_CreateInstance( )
  55 {
  56     PERQUEUEDATA *pQData;
  57
  58     BOOL16 bIsWin16 = 0;
  59
  60     TRACE(msg,"()\n");
  61
  62     /* Share a single instance of perQData for all 16 bit tasks */
  63     if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
  64     {
  65         /* If previously allocated, just bump up ref count */
  66         if ( pQDataWin16 )
  67         {
  68             PERQDATA_Addref( pQDataWin16 );
  69             return pQDataWin16;
  70         }
  71     }
  72
  73     /* Allocate PERQUEUEDATA from the system heap */
  74     if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
  75                                                     sizeof(PERQUEUEDATA) ) ))
  76         return 0;
  77
  78     /* Initialize */
  79     pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
  80     pQData->ulRefCount = 1;
  81     pQData->nCaptureHT = HTCLIENT;
  82
  83     /* Note: We have an independent critical section for the per queue data
  84      * since this may be shared by different threads. see AttachThreadInput()
  85      */
  86     InitializeCriticalSection( &pQData->cSection );
  87
  88     /* Save perQData globally for 16 bit tasks */
  89     if ( bIsWin16 )
  90         pQDataWin16 = pQData;
  91
  92     return pQData;
  93 }
  94
  95
  96 /***********************************************************************
  97  *           PERQDATA_Addref
  98  *
  99  * Increment reference count for the PERQUEUEDATA instance
 100  * Returns reference count for debugging purposes
 101  */
 102 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
 103 {
 104     assert(pQData != 0 );
 105     TRACE(msg,"(): current refcount %lu ...\n", pQData->ulRefCount);
 106
 107     EnterCriticalSection( &pQData->cSection );
 108     ++pQData->ulRefCount;
 109     LeaveCriticalSection( &pQData->cSection );
 110
 111     return pQData->ulRefCount;
 112 }
 113
 114
 115 /***********************************************************************
 116  *           PERQDATA_Release
 117  *
 118  * Release a reference to a PERQUEUEDATA instance.
 119  * Destroy the instance if no more references exist
 120  * Returns reference count for debugging purposes
 121  */
 122 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
 123 {
 124     assert(pQData != 0 );
 125     TRACE(msg,"(): current refcount %lu ...\n",
 126           (LONG)pQData->ulRefCount );
 127
 128     EnterCriticalSection( &pQData->cSection );
 129     if ( --pQData->ulRefCount == 0 )
 130     {
 131         LeaveCriticalSection( &pQData->cSection );
 132         DeleteCriticalSection( &pQData->cSection );
 133
 134         TRACE(msg,"(): deleting PERQUEUEDATA instance ...\n" );
 135
 136         /* Deleting our global 16 bit perQData? */
 137         if ( pQData == pQDataWin16 )
 138             pQDataWin16 = 0;
 139
 140         /* Free the PERQUEUEDATA instance */
 141         HeapFree( SystemHeap, 0, pQData );
 142
 143         return 0;
 144     }
 145     LeaveCriticalSection( &pQData->cSection );
 146
 147     return pQData->ulRefCount;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           PERQDATA_GetFocusWnd
 153  *
 154  * Get the focus hwnd member in a threadsafe manner
 155  */
 156 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
 157 {
 158     HWND hWndFocus;
 159     assert(pQData != 0 );
 160
 161     EnterCriticalSection( &pQData->cSection );
 162     hWndFocus = pQData->hWndFocus;
 163     LeaveCriticalSection( &pQData->cSection );
 164
 165     return hWndFocus;
 166 }
 167
 168
 169 /***********************************************************************
 170  *           PERQDATA_SetFocusWnd
 171  *
 172  * Set the focus hwnd member in a threadsafe manner
 173  */
 174 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
 175 {
 176     HWND hWndFocusPrv;
 177     assert(pQData != 0 );
 178
 179     EnterCriticalSection( &pQData->cSection );
 180     hWndFocusPrv = pQData->hWndFocus;
 181     pQData->hWndFocus = hWndFocus;
 182     LeaveCriticalSection( &pQData->cSection );
 183
 184     return hWndFocusPrv;
 185 }
 186
 187
 188 /***********************************************************************
 189  *           PERQDATA_GetActiveWnd
 190  *
 191  * Get the active hwnd member in a threadsafe manner
 192  */
 193 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
 194 {
 195     HWND hWndActive;
 196     assert(pQData != 0 );
 197
 198     EnterCriticalSection( &pQData->cSection );
 199     hWndActive = pQData->hWndActive;
 200     LeaveCriticalSection( &pQData->cSection );
 201
 202     return hWndActive;
 203 }
 204
 205
 206 /***********************************************************************
 207  *           PERQDATA_SetActiveWnd
 208  *
 209  * Set the active focus hwnd member in a threadsafe manner
 210  */
 211 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
 212 {
 213     HWND hWndActivePrv;
 214     assert(pQData != 0 );
 215
 216     EnterCriticalSection( &pQData->cSection );
 217     hWndActivePrv = pQData->hWndActive;
 218     pQData->hWndActive = hWndActive;
 219     LeaveCriticalSection( &pQData->cSection );
 220
 221     return hWndActivePrv;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           PERQDATA_GetCaptureWnd
 227  *
 228  * Get the capture hwnd member in a threadsafe manner
 229  */
 230 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
 231 {
 232     HWND hWndCapture;
 233     assert(pQData != 0 );
 234
 235     EnterCriticalSection( &pQData->cSection );
 236     hWndCapture = pQData->hWndCapture;
 237     LeaveCriticalSection( &pQData->cSection );
 238
 239     return hWndCapture;
 240 }
 241
 242
 243 /***********************************************************************
 244  *           PERQDATA_SetCaptureWnd
 245  *
 246  * Set the capture hwnd member in a threadsafe manner
 247  */
 248 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
 249 {
 250     HWND hWndCapturePrv;
 251     assert(pQData != 0 );
 252
 253     EnterCriticalSection( &pQData->cSection );
 254     hWndCapturePrv = pQData->hWndCapture;
 255     pQData->hWndCapture = hWndCapture;
 256     LeaveCriticalSection( &pQData->cSection );
 257
 258     return hWndCapturePrv;
 259 }
 260
 261
 262 /***********************************************************************
 263  *           PERQDATA_GetCaptureInfo
 264  *
 265  * Get the capture info member in a threadsafe manner
 266  */
 267 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
 268 {
 269     INT16 nCaptureHT;
 270     assert(pQData != 0 );
 271
 272     EnterCriticalSection( &pQData->cSection );
 273     nCaptureHT = pQData->nCaptureHT;
 274     LeaveCriticalSection( &pQData->cSection );
 275
 276     return nCaptureHT;
 277 }
 278
 279
 280 /***********************************************************************
 281  *           PERQDATA_SetCaptureInfo
 282  *
 283  * Set the capture info member in a threadsafe manner
 284  */
 285 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
 286 {
 287     INT16 nCaptureHTPrv;
 288     assert(pQData != 0 );
 289
 290     EnterCriticalSection( &pQData->cSection );
 291     nCaptureHTPrv = pQData->nCaptureHT;
 292     pQData->nCaptureHT = nCaptureHT;
 293     LeaveCriticalSection( &pQData->cSection );
 294
 295     return nCaptureHTPrv;
 296 }
 297
 298
 299 /***********************************************************************
 300  *           QUEUE_Lock
 301  *
 302  * Function for getting a 32 bit pointer on queue strcture. For thread
 303  * safeness programmers should use this function instead of GlobalLock to
 304  * retrieve a pointer on the structure. QUEUE_Unlock should also be called
 305  * when access to the queue structure is not required anymore.
 306  */
 307 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
 308 {
 309     MESSAGEQUEUE *queue;
 310
 311     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 312     queue = GlobalLock16( hQueue );
 313     if ( !queue || (queue->magic != QUEUE_MAGIC) )
 314     {
 315         HeapUnlock( SystemHeap );
 316         return NULL;
 317     }
 318
 319     queue->lockCount++;
 320     HeapUnlock( SystemHeap );
 321     return queue;
 322 }
 323
 324
 325 /***********************************************************************
 326  *           QUEUE_Unlock
 327  *
 328  * Use with QUEUE_Lock to get a thread safe acces to message queue
 329  * structure
 330  */
 331 void QUEUE_Unlock( MESSAGEQUEUE *queue )
 332 {
 333     if (queue)
 334     {
 335         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 336
 337         if ( --queue->lockCount == 0 )
 338         {
 339             DeleteCriticalSection ( &queue->cSection );
 340             if (queue->hEvent)
 341                 CloseHandle( queue->hEvent );
 342             GlobalFree16( queue->self );
 343         }
 344
 345         HeapUnlock( SystemHeap );
 346     }
 347 }
 348
 349
 350 /***********************************************************************
 351  *           QUEUE_DumpQueue
 352  */
 353 void QUEUE_DumpQueue( HQUEUE16 hQueue )
 354 {
 355     MESSAGEQUEUE *pq;
 356
 357     if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
 358     {
 359         WARN(msg, "%04x is not a queue handle\n", hQueue );
 360         return;
 361     }
 362
 363     DUMP(    "next: %12.4x  Intertask SendMessage:\n"
 364              "thread: %10p  ----------------------\n"
 365              "firstMsg: %8p   smWaiting:     %10p\n"
 366              "lastMsg:  %8p   smPending:     %10p\n"
 367              "msgCount: %8.4x   smProcessing:  %10p\n"
 368              "lockCount: %7.4x\n"
 369              "wWinVer: %9.4x\n"
 370              "paints: %10.4x\n"
 371              "timers: %10.4x\n"
 372              "wakeBits: %8.4x\n"
 373              "wakeMask: %8.4x\n"
 374              "hCurHook: %8.4x\n",
 375              pq->next, pq->thdb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
 376              pq->smPending, pq->msgCount, pq->smProcessing,
 377              (unsigned)pq->lockCount, pq->wWinVersion,
 378              pq->wPaintCount, pq->wTimerCount,
 379              pq->wakeBits, pq->wakeMask, pq->hCurHook);
 380
 381     QUEUE_Unlock( pq );
 382 }
 383
 384
 385 /***********************************************************************
 386  *           QUEUE_WalkQueues
 387  */
 388 void QUEUE_WalkQueues(void)
 389 {
 390     char module[10];
 391     HQUEUE16 hQueue = hFirstQueue;
 392
 393     DUMP( "Queue Msgs Thread   Task Module\n" );
 394     while (hQueue)
 395     {
 396         MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
 397         if (!queue)
 398         {
 399             WARN( msg, "Bad queue handle %04x\n", hQueue );
 400             return;
 401         }
 402         if (!GetModuleName16( queue->thdb->process->task, module, sizeof(module )))
 403             strcpy( module, "???" );
 404         DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 405               queue->thdb, queue->thdb->process->task, module );
 406         hQueue = queue->next;
 407         QUEUE_Unlock( queue );
 408     }
 409     DUMP( "\n" );
 410 }
 411
 412
 413 /***********************************************************************
 414  *           QUEUE_IsExitingQueue
 415  */
 416 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
 417 {
 418     return (hExitingQueue && (hQueue == hExitingQueue));
 419 }
 420
 421
 422 /***********************************************************************
 423  *           QUEUE_SetExitingQueue
 424  */
 425 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
 426 {
 427     hExitingQueue = hQueue;
 428 }
 429
 430
 431 /***********************************************************************
 432  *           QUEUE_CreateMsgQueue
 433  *
 434  * Creates a message queue. Doesn't link it into queue list!
 435  */
 436 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
 437 {
 438     HQUEUE16 hQueue;
 439     MESSAGEQUEUE * msgQueue;
 440     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 441
 442     TRACE(msg,"(): Creating message queue...\n");
 443
 444     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 445                                   sizeof(MESSAGEQUEUE) )))
 446         return 0;
 447
 448     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 449     if ( !msgQueue )
 450         return 0;
 451
 452     msgQueue->self        = hQueue;
 453     msgQueue->wakeBits    = msgQueue->changeBits = 0;
 454     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 455
 456     InitializeCriticalSection( &msgQueue->cSection );
 457     MakeCriticalSectionGlobal( &msgQueue->cSection );
 458
 459     /* Create an Event object for waiting on message, used by win32 thread
 460        only */
 461     if ( !THREAD_IsWin16( THREAD_Current() ) )
 462     {
 463         msgQueue->hEvent = CreateEventA( NULL, FALSE, FALSE, NULL);
 464
 465         if (msgQueue->hEvent == 0)
 466         {
 467             WARN(msg, "CreateEvent32A is not able to create an event object");
 468             return 0;
 469         }
 470         msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
 471     }
 472     else
 473         msgQueue->hEvent = 0;
 474
 475     msgQueue->lockCount = 1;
 476     msgQueue->magic = QUEUE_MAGIC;
 477
 478     /* Create and initialize our per queue data */
 479     msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
 480
 481     return hQueue;
 482 }
 483
 484
 485 /***********************************************************************
 486  *           QUEUE_FlushMessage
 487  *
 488  * Try to reply to all pending sent messages on exit.
 489  */
 490 void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
 491 {
 492     SMSG *smsg;
 493     MESSAGEQUEUE *senderQ = 0;
 494
 495     if( queue )
 496     {
 497         EnterCriticalSection( &queue->cSection );
 498
 499         /* empty the list of pending SendMessage waiting to be received */
 500         while (queue->smPending)
 501         {
 502             smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
 503
 504             senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 505             if ( !senderQ )
 506                 continue;
 507
 508             /* return 0, to unblock other thread */
 509             smsg->lResult = 0;
 510             smsg->flags |= SMSG_HAVE_RESULT;
 511             QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 512
 513             QUEUE_Unlock( senderQ );
 514         }
 515
 516         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 517
 518         LeaveCriticalSection( &queue->cSection );
 519     }
 520 }
 521
 522
 523 /***********************************************************************
 524  *           QUEUE_DeleteMsgQueue
 525  *
 526  * Unlinks and deletes a message queue.
 527  *
 528  * Note: We need to mask asynchronous events to make sure PostMessage works
 529  * even in the signal handler.
 530  */
 531 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 532 {
 533     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
 534     HQUEUE16 *pPrev;
 535
 536     TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
 537
 538     if (!hQueue || !msgQueue)
 539     {
 540         WARN(msg, "invalid argument.\n");
 541         return 0;
 542     }
 543
 544     msgQueue->magic = 0;
 545
 546     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 547     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 548
 549     /* flush sent messages */
 550     QUEUE_FlushMessages( msgQueue );
 551
 552     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 553
 554     /* Release per queue data if present */
 555     if ( msgQueue->pQData )
 556     {
 557         PERQDATA_Release( msgQueue->pQData );
 558         msgQueue->pQData = 0;
 559     }
 560
 561     /* remove the message queue from the global link list */
 562     pPrev = &hFirstQueue;
 563     while (*pPrev && (*pPrev != hQueue))
 564     {
 565         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 566
 567         /* sanity check */
 568         if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
 569         {
 570             /* HQUEUE link list is corrupted, try to exit gracefully */
 571             WARN( msg, "HQUEUE link list corrupted!\n");
 572             pPrev = 0;
 573             break;
 574         }
 575         pPrev = &msgQ->next;
 576     }
 577     if (pPrev && *pPrev) *pPrev = msgQueue->next;
 578     msgQueue->self = 0;
 579
 580     HeapUnlock( SystemHeap );
 581
 582     /* free up resource used by MESSAGEQUEUE strcture */
 583     msgQueue->lockCount--;
 584     QUEUE_Unlock( msgQueue );
 585
 586     return 1;
 587 }
 588
 589
 590 /***********************************************************************
 591  *           QUEUE_CreateSysMsgQueue
 592  *
 593  * Create the system message queue, and set the double-click speed.
 594  * Must be called only once.
 595  */
 596 BOOL QUEUE_CreateSysMsgQueue( int size )
 597 {
 598     /* Note: We dont need perQ data for the system message queue */
 599     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
 600         return FALSE;
 601
 602     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 603     return TRUE;
 604 }
 605
 606
 607 /***********************************************************************
 608  *           QUEUE_GetSysQueue
 609  */
 610 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 611 {
 612     return sysMsgQueue;
 613 }
 614
 615
 616 /***********************************************************************
 617  *           QUEUE_SetWakeBit
 618  *
 619  * See "Windows Internals", p.449
 620  */
 621 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 622 {
 623     TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
 624                         queue->self, queue->wakeMask, bit );
 625
 626     if (bit & QS_MOUSE) pMouseQueue = queue;
 627     if (bit & QS_KEY) pKbdQueue = queue;
 628     queue->changeBits |= bit;
 629     queue->wakeBits   |= bit;
 630     if (queue->wakeMask & bit)
 631     {
 632         queue->wakeMask = 0;
 633
 634         /* Wake up thread waiting for message */
 635         if ( THREAD_IsWin16( queue->thdb ) )
 636             PostEvent16( queue->thdb->process->task );
 637         else
 638         {
 639             SetEvent( queue->hEvent );
 640         }
 641     }
 642 }
 643
 644
 645 /***********************************************************************
 646  *           QUEUE_ClearWakeBit
 647  */
 648 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 649 {
 650     queue->changeBits &= ~bit;
 651     queue->wakeBits   &= ~bit;
 652 }
 653
 654
 655 /***********************************************************************
 656  *           QUEUE_WaitBits
 657  *
 658  * See "Windows Internals", p.447
 659  *
 660  * return values:
 661  *    0 if exit with timeout
 662  *    1 otherwise
 663  */
 664 int QUEUE_WaitBits( WORD bits, DWORD timeout )
 665 {
 666     MESSAGEQUEUE *queue;
 667     DWORD curTime = 0;
 668
 669     TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue16(), bits);
 670
 671     if ( THREAD_IsWin16( THREAD_Current() ) && (timeout != INFINITE) )
 672         curTime = GetTickCount();
 673
 674     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
 675
 676     for (;;)
 677     {
 678         if (queue->changeBits & bits)
 679         {
 680             /* One of the bits is set; we can return */
 681             queue->wakeMask = 0;
 682             QUEUE_Unlock( queue );
 683             return 1;
 684         }
 685         if (queue->wakeBits & QS_SENDMESSAGE)
 686         {
 687             /* Process the sent message immediately */
 688
 689             queue->wakeMask = 0;
 690             QUEUE_ReceiveMessage( queue );
 691             continue;                           /* nested sm crux */
 692         }
 693
 694         queue->wakeMask = bits | QS_SENDMESSAGE;
 695         if(queue->changeBits & bits)
 696         {
 697             continue;
 698         }
 699
 700         TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 701
 702         if ( !THREAD_IsWin16( THREAD_Current() ) )
 703         {
 704             /* win32 thread, use WaitForMultipleObjects */
 705             MsgWaitForMultipleObjects( 0, NULL, FALSE, timeout, queue->wakeMask );
 706         }
 707         else
 708         {
 709             if ( timeout == INFINITE )
 710                 WaitEvent16( 0 );  /* win 16 thread, use WaitEvent */
 711             else
 712             {
 713                 /* check for timeout, then give control to other tasks */
 714                 if (GetTickCount() - curTime > timeout)
 715                 {
 716
 717         QUEUE_Unlock( queue );
 718                     return 0;   /* exit with timeout */
 719                 }
 720                 Yield16();
 721             }
 722     }
 723 }
 724 }
 725
 726
 727 /***********************************************************************
 728  *           QUEUE_AddSMSG
 729  *
 730  * This routine is called when a SMSG need to be added to one of the three
 731  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 732  */
 733 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 734 {
 735     TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 736           smsg, SPY_GetMsgName(smsg->msg));
 737
 738     switch (list)
 739     {
 740         case SM_PROCESSING_LIST:
 741             /* don't need to be thread safe, only accessed by the
 742              thread associated with the sender queue */
 743             smsg->nextProcessing = queue->smProcessing;
 744             queue->smProcessing = smsg;
 745             break;
 746
 747         case SM_WAITING_LIST:
 748             /* don't need to be thread safe, only accessed by the
 749              thread associated with the receiver queue */
 750             smsg->nextWaiting = queue->smWaiting;
 751             queue->smWaiting = smsg;
 752             break;
 753
 754         case SM_PENDING_LIST:
 755         {
 756             /* make it thread safe, could be accessed by the sender and
 757              receiver thread */
 758             SMSG **prev;
 759
 760             EnterCriticalSection( &queue->cSection );
 761             smsg->nextPending = NULL;
 762             prev = &queue->smPending;
 763             while ( *prev )
 764                 prev = &(*prev)->nextPending;
 765             *prev = smsg;
 766             LeaveCriticalSection( &queue->cSection );
 767
 768             QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
 769             break;
 770         }
 771
 772         default:
 773             WARN(sendmsg, "Invalid list: %d", list);
 774             break;
 775     }
 776
 777     return TRUE;
 778 }
 779
 780
 781 /***********************************************************************
 782  *           QUEUE_RemoveSMSG
 783  *
 784  * This routine is called when a SMSG need to be remove from one of the three
 785  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 786  * If smsg == 0, remove the first smsg from the specified list
 787  */
 788 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 789 {
 790
 791     switch (list)
 792     {
 793         case SM_PROCESSING_LIST:
 794             /* don't need to be thread safe, only accessed by the
 795              thread associated with the sender queue */
 796
 797             /* if smsg is equal to null, it means the first in the list */
 798             if (!smsg)
 799                 smsg = queue->smProcessing;
 800
 801             TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 802                   smsg, SPY_GetMsgName(smsg->msg));
 803             /* In fact SM_PROCESSING_LIST is a stack, and smsg
 804              should be always at the top of the list */
 805             if ( (smsg != queue->smProcessing) || !queue->smProcessing )
 806         {
 807                 ERR( sendmsg, "smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
 808                 return 0;
 809             }
 810             else
 811             {
 812                 queue->smProcessing = smsg->nextProcessing;
 813                 smsg->nextProcessing = 0;
 814         }
 815             return smsg;
 816
 817         case SM_WAITING_LIST:
 818             /* don't need to be thread safe, only accessed by the
 819              thread associated with the receiver queue */
 820
 821             /* if smsg is equal to null, it means the first in the list */
 822             if (!smsg)
 823                 smsg = queue->smWaiting;
 824
 825             TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 826                   smsg, SPY_GetMsgName(smsg->msg));
 827             /* In fact SM_WAITING_LIST is a stack, and smsg
 828              should be always at the top of the list */
 829             if ( (smsg != queue->smWaiting) || !queue->smWaiting )
 830             {
 831                 ERR( sendmsg, "smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
 832                 return 0;
 833             }
 834             else
 835             {
 836                 queue->smWaiting = smsg->nextWaiting;
 837                 smsg->nextWaiting = 0;
 838     }
 839             return smsg;
 840
 841         case SM_PENDING_LIST:
 842             /* make it thread safe, could be accessed by the sender and
 843              receiver thread */
 844             EnterCriticalSection( &queue->cSection );
 845
 846             if (!smsg || !queue->smPending)
 847                 smsg = queue->smPending;
 848             else
 849             {
 850                 ERR( sendmsg, "should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
 851                 return 0;
 852             }
 853
 854             TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 855                   smsg, SPY_GetMsgName(smsg->msg));
 856
 857             queue->smPending = smsg->nextPending;
 858             smsg->nextPending = 0;
 859
 860             /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
 861             if (!queue->smPending)
 862                 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 863
 864             LeaveCriticalSection( &queue->cSection );
 865             return smsg;
 866
 867         default:
 868             WARN(sendmsg, "Invalid list: %d", list);
 869             break;
 870     }
 871
 872     return 0;
 873 }
 874
 875
 876 /***********************************************************************
 877  *           QUEUE_ReceiveMessage
 878  *
 879  * This routine is called when a sent message is waiting for the queue.
 880  */
 881 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 882 {
 883     LRESULT       result = 0;
 884     SMSG          *smsg;
 885     MESSAGEQUEUE  *senderQ;
 886
 887     TRACE(sendmsg, "queue %04x\n", queue->self );
 888
 889     if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
 890     {
 891         TRACE(sendmsg,"\trcm: nothing to do\n");
 892         return;
 893     }
 894
 895     /* remove smsg on the top of the pending list and put it in the processing list */
 896     smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
 897     QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
 898
 899     TRACE(sendmsg,"RM: %s [%04x] (%04x -> %04x)\n",
 900             SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
 901
 902     if (IsWindow( smsg->hWnd ))
 903     {
 904         WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
 905         DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
 906
 907         /* use sender queue extra info value while calling the window proc */
 908         senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 909         if (senderQ)
 910   {
 911             queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 912             QUEUE_Unlock( senderQ );
 913         }
 914
 915         /* call the right version of CallWindowProcXX */
 916         if (smsg->flags & SMSG_WIN32)
 917         {
 918             TRACE(sendmsg, "\trcm: msg is Win32\n" );
 919             if (smsg->flags & SMSG_UNICODE)
 920                 result = CallWindowProcW( wndPtr->winproc,
 921                                             smsg->hWnd, smsg->msg,
 922                                             smsg->wParam, smsg->lParam );
 923             else
 924                 result = CallWindowProcA( wndPtr->winproc,
 925                                             smsg->hWnd, smsg->msg,
 926                                             smsg->wParam, smsg->lParam );
 927         }
 928         else  /* Win16 message */
 929             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 930                                        (HWND16) smsg->hWnd,
 931                                        (UINT16) smsg->msg,
 932                                        LOWORD (smsg->wParam),
 933                                        smsg->lParam );
 934
 935         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 936         WIN_ReleaseWndPtr(wndPtr);
 937         TRACE(sendmsg,"result =  %08x\n", (unsigned)result );
 938     }
 939     else WARN(sendmsg, "\trcm: bad hWnd\n");
 940
 941
 942         /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
 943          an early reply */
 944         smsg->flags |= SMSG_SENDING_REPLY;
 945         ReplyMessage( result );
 946
 947     TRACE( sendmsg,"done! \n" );
 948 }
 949
 950
 951
 952 /***********************************************************************
 953  *           QUEUE_AddMsg
 954  *
 955  * Add a message to the queue. Return FALSE if queue is full.
 956  */
 957 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG *msg, DWORD extraInfo )
 958 {
 959     MESSAGEQUEUE *msgQueue;
 960     QMSG         *qmsg;
 961
 962
 963     if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
 964
 965     /* allocate new message in global heap for now */
 966     if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
 967     {
 968         QUEUE_Unlock( msgQueue );
 969         return 0;
 970     }
 971
 972     EnterCriticalSection( &msgQueue->cSection );
 973
 974       /* Store message */
 975     qmsg->msg = *msg;
 976     qmsg->extraInfo = extraInfo;
 977
 978     /* insert the message in the link list */
 979     qmsg->nextMsg = 0;
 980     qmsg->prevMsg = msgQueue->lastMsg;
 981
 982     if (msgQueue->lastMsg)
 983         msgQueue->lastMsg->nextMsg = qmsg;
 984
 985     /* update first and last anchor in message queue */
 986     msgQueue->lastMsg = qmsg;
 987     if (!msgQueue->firstMsg)
 988         msgQueue->firstMsg = qmsg;
 989
 990     msgQueue->msgCount++;
 991
 992     LeaveCriticalSection( &msgQueue->cSection );
 993
 994     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
 995     QUEUE_Unlock( msgQueue );
 996
 997     return TRUE;
 998 }
 999
1000
1001
1002 /***********************************************************************
1003  *           QUEUE_FindMsg
1004  *
1005  * Find a message matching the given parameters. Return -1 if none available.
1006  */
1007 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1008 {
1009     QMSG* qmsg;
1010
1011     EnterCriticalSection( &msgQueue->cSection );
1012
1013     if (!msgQueue->msgCount)
1014         qmsg = 0;
1015     else if (!hwnd && !first && !last)
1016         qmsg = msgQueue->firstMsg;
1017     else
1018     {
1019         /* look in linked list for message matching first and last criteria */
1020         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1021     {
1022             MSG *msg = &(qmsg->msg);
1023
1024         if (!hwnd || (msg->hwnd == hwnd))
1025         {
1026                 if (!first && !last)
1027                     break;   /* found it */
1028
1029                 if ((msg->message >= first) && (!last || (msg->message <= last)))
1030                     break;   /* found it */
1031             }
1032         }
1033     }
1034
1035     LeaveCriticalSection( &msgQueue->cSection );
1036
1037     return qmsg;
1038 }
1039
1040
1041
1042 /***********************************************************************
1043  *           QUEUE_RemoveMsg
1044  *
1045  * Remove a message from the queue (pos must be a valid position).
1046  */
1047 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1048 {
1049     EnterCriticalSection( &msgQueue->cSection );
1050
1051     /* set the linked list */
1052     if (qmsg->prevMsg)
1053         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1054
1055     if (qmsg->nextMsg)
1056         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1057
1058     if (msgQueue->firstMsg == qmsg)
1059         msgQueue->firstMsg = qmsg->nextMsg;
1060
1061     if (msgQueue->lastMsg == qmsg)
1062         msgQueue->lastMsg = qmsg->prevMsg;
1063
1064     /* deallocate the memory for the message */
1065     HeapFree( SystemHeap, 0, qmsg );
1066
1067     msgQueue->msgCount--;
1068     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1069
1070     LeaveCriticalSection( &msgQueue->cSection );
1071 }
1072
1073
1074 /***********************************************************************
1075  *           QUEUE_WakeSomeone
1076  *
1077  * Wake a queue upon reception of a hardware event.
1078  */
1079 static void QUEUE_WakeSomeone( UINT message )
1080 {
1081     WND*          wndPtr = NULL;
1082     WORD          wakeBit;
1083     HWND hwnd;
1084     HQUEUE16     hQueue = 0;
1085     MESSAGEQUEUE *queue = NULL;
1086
1087     if (hCursorQueue)
1088         hQueue = hCursorQueue;
1089
1090     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1091     {
1092        wakeBit = QS_KEY;
1093        if( hActiveQueue )
1094            hQueue = hActiveQueue;
1095     }
1096     else
1097     {
1098        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1099        if( (hwnd = GetCapture()) )
1100          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1101            {
1102                hQueue = wndPtr->hmemTaskQ;
1103                WIN_ReleaseWndPtr(wndPtr);
1104            }
1105     }
1106
1107     if( (hwnd = GetSysModalWindow16()) )
1108     {
1109       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1110         {
1111             hQueue = wndPtr->hmemTaskQ;
1112             WIN_ReleaseWndPtr(wndPtr);
1113         }
1114     }
1115
1116     if (hQueue)
1117         queue = QUEUE_Lock( hQueue );
1118
1119     if( !queue )
1120     {
1121         queue = QUEUE_Lock( hFirstQueue );
1122       while( queue )
1123       {
1124         if (queue->wakeMask & wakeBit) break;
1125
1126             QUEUE_Unlock(queue);
1127             queue = QUEUE_Lock( queue->next );
1128       }
1129       if( !queue )
1130       {
1131         WARN(msg, "couldn't find queue\n");
1132         return;
1133       }
1134     }
1135
1136     QUEUE_SetWakeBit( queue, wakeBit );
1137
1138     QUEUE_Unlock( queue );
1139 }
1140
1141
1142 /***********************************************************************
1143  *           hardware_event
1144  *
1145  * Add an event to the system message queue.
1146  * Note: the position is relative to the desktop window.
1147  */
1148 void hardware_event( WORD message, WORD wParam, LONG lParam,
1149                      int xPos, int yPos, DWORD time, DWORD extraInfo )
1150 {
1151     MSG *msg;
1152     QMSG  *qmsg;
1153     int  mergeMsg = 0;
1154
1155     if (!sysMsgQueue) return;
1156
1157     EnterCriticalSection( &sysMsgQueue->cSection );
1158
1159     /* Merge with previous event if possible */
1160     qmsg = sysMsgQueue->lastMsg;
1161
1162     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1163     {
1164         msg = &(sysMsgQueue->lastMsg->msg);
1165
1166         if ((msg->message == message) && (msg->wParam == wParam))
1167         {
1168             /* Merge events */
1169             qmsg = sysMsgQueue->lastMsg;
1170             mergeMsg = 1;
1171     }
1172     }
1173
1174     if (!mergeMsg)
1175     {
1176         /* Should I limit the number of message in
1177           the system message queue??? */
1178
1179         /* Don't merge allocate a new msg in the global heap */
1180
1181         if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1182         {
1183             LeaveCriticalSection( &sysMsgQueue->cSection );
1184             return;
1185         }
1186
1187         /* put message at the end of the linked list */
1188         qmsg->nextMsg = 0;
1189         qmsg->prevMsg = sysMsgQueue->lastMsg;
1190
1191         if (sysMsgQueue->lastMsg)
1192             sysMsgQueue->lastMsg->nextMsg = qmsg;
1193
1194         /* set last and first anchor index in system message queue */
1195         sysMsgQueue->lastMsg = qmsg;
1196         if (!sysMsgQueue->firstMsg)
1197             sysMsgQueue->firstMsg = qmsg;
1198
1199         sysMsgQueue->msgCount++;
1200     }
1201
1202       /* Store message */
1203     msg = &(qmsg->msg);
1204     msg->hwnd    = 0;
1205     msg->message = message;
1206     msg->wParam  = wParam;
1207     msg->lParam  = lParam;
1208     msg->time    = time;
1209     msg->pt.x    = xPos;
1210     msg->pt.y    = yPos;
1211     qmsg->extraInfo = extraInfo;
1212
1213     LeaveCriticalSection( &sysMsgQueue->cSection );
1214
1215     QUEUE_WakeSomeone( message );
1216 }
1217
1218
1219 /***********************************************************************
1220  *           QUEUE_GetQueueTask
1221  */
1222 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1223 {
1224     HTASK16 hTask = 0;
1225
1226     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1227
1228     if (queue)
1229 {
1230         hTask = queue->thdb->process->task;
1231         QUEUE_Unlock( queue );
1232 }
1233
1234     return hTask;
1235 }
1236
1237
1238
1239 /***********************************************************************
1240  *           QUEUE_IncPaintCount
1241  */
1242 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1243 {
1244     MESSAGEQUEUE *queue;
1245
1246     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1247     queue->wPaintCount++;
1248     QUEUE_SetWakeBit( queue, QS_PAINT );
1249     QUEUE_Unlock( queue );
1250 }
1251
1252
1253 /***********************************************************************
1254  *           QUEUE_DecPaintCount
1255  */
1256 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1257 {
1258     MESSAGEQUEUE *queue;
1259
1260     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1261     queue->wPaintCount--;
1262     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1263     QUEUE_Unlock( queue );
1264 }
1265
1266
1267 /***********************************************************************
1268  *           QUEUE_IncTimerCount
1269  */
1270 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1271 {
1272     MESSAGEQUEUE *queue;
1273
1274     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1275     queue->wTimerCount++;
1276     QUEUE_SetWakeBit( queue, QS_TIMER );
1277     QUEUE_Unlock( queue );
1278 }
1279
1280
1281 /***********************************************************************
1282  *           QUEUE_DecTimerCount
1283  */
1284 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1285 {
1286     MESSAGEQUEUE *queue;
1287
1288     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1289     queue->wTimerCount--;
1290     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1291     QUEUE_Unlock( queue );
1292 }
1293
1294
1295 /***********************************************************************
1296  *           PostQuitMessage16   (USER.6)
1297  */
1298 void WINAPI PostQuitMessage16( INT16 exitCode )
1299 {
1300     PostQuitMessage( exitCode );
1301 }
1302
1303
1304 /***********************************************************************
1305  *           PostQuitMessage32   (USER32.421)
1306  *
1307  * PostQuitMessage() posts a message to the system requesting an
1308  * application to terminate execution. As a result of this function,
1309  * the WM_QUIT message is posted to the application, and
1310  * PostQuitMessage() returns immediately.  The exitCode parameter
1311  * specifies an application-defined exit code, which appears in the
1312  * _wParam_ parameter of the WM_QUIT message posted to the application.
1313  *
1314  * CONFORMANCE
1315  *
1316  *  ECMA-234, Win32
1317  */
1318 void WINAPI PostQuitMessage( INT exitCode )
1319 {
1320     MESSAGEQUEUE *queue;
1321
1322     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1323     queue->wPostQMsg = TRUE;
1324     queue->wExitCode = (WORD)exitCode;
1325     QUEUE_Unlock( queue );
1326 }
1327
1328
1329 /***********************************************************************
1330  *           GetWindowTask16   (USER.224)
1331  */
1332 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1333 {
1334     HTASK16 retvalue;
1335     WND *wndPtr = WIN_FindWndPtr( hwnd );
1336
1337     if (!wndPtr) return 0;
1338     retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1339     WIN_ReleaseWndPtr(wndPtr);
1340     return retvalue;
1341 }
1342
1343 /***********************************************************************
1344  *           GetWindowThreadProcessId   (USER32.313)
1345  */
1346 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1347 {
1348     HTASK16 htask;
1349     TDB *tdb;
1350
1351     WND *wndPtr = WIN_FindWndPtr( hwnd );
1352
1353     if (!wndPtr) return 0;
1354     htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1355     WIN_ReleaseWndPtr(wndPtr);
1356     tdb = (TDB*)GlobalLock16(htask);
1357     if (!tdb || !tdb->thdb) return 0;
1358     if (process) *process = (DWORD)tdb->thdb->process->server_pid;
1359     return (DWORD)tdb->thdb->server_tid;
1360 }
1361
1362
1363 /***********************************************************************
1364  *           SetMessageQueue16   (USER.266)
1365  */
1366 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1367 {
1368     return SetMessageQueue( size );
1369 }
1370
1371
1372 /***********************************************************************
1373  *           SetMessageQueue32   (USER32.494)
1374  */
1375 BOOL WINAPI SetMessageQueue( INT size )
1376 {
1377     /* now obsolete the message queue will be expanded dynamically
1378      as necessary */
1379
1380     /* access the queue to create it if it's not existing */
1381     GetFastQueue16();
1382
1383     return TRUE;
1384 }
1385
1386 /***********************************************************************
1387  *           InitThreadInput   (USER.409)
1388  */
1389 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1390 {
1391     HQUEUE16 hQueue;
1392     MESSAGEQUEUE *queuePtr;
1393
1394     THDB *thdb = THREAD_Current();
1395
1396     if (!thdb)
1397         return 0;
1398
1399     hQueue = thdb->teb.queue;
1400
1401     if ( !hQueue )
1402     {
1403         /* Create thread message queue */
1404         if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1405         {
1406             WARN(msg, "failed!\n");
1407             return FALSE;
1408     }
1409
1410         /* Link new queue into list */
1411         queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1412         queuePtr->thdb = THREAD_Current();
1413
1414         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
1415         SetThreadQueue16( 0, hQueue );
1416         thdb->teb.queue = hQueue;
1417
1418         queuePtr->next  = hFirstQueue;
1419         hFirstQueue = hQueue;
1420         HeapUnlock( SystemHeap );
1421
1422         QUEUE_Unlock( queuePtr );
1423     }
1424
1425     return hQueue;
1426 }
1427
1428 /***********************************************************************
1429  *           GetQueueStatus16   (USER.334)
1430  */
1431 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1432 {
1433     MESSAGEQUEUE *queue;
1434     DWORD ret;
1435
1436     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1437     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1438     queue->changeBits = 0;
1439     QUEUE_Unlock( queue );
1440
1441     return ret & MAKELONG( flags, flags );
1442 }
1443
1444 /***********************************************************************
1445  *           GetQueueStatus32   (USER32.283)
1446  */
1447 DWORD WINAPI GetQueueStatus( UINT flags )
1448 {
1449     MESSAGEQUEUE *queue;
1450     DWORD ret;
1451
1452     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1453     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1454     queue->changeBits = 0;
1455     QUEUE_Unlock( queue );
1456
1457     return ret & MAKELONG( flags, flags );
1458 }
1459
1460
1461 /***********************************************************************
1462  *           GetInputState16   (USER.335)
1463  */
1464 BOOL16 WINAPI GetInputState16(void)
1465 {
1466     return GetInputState();
1467 }
1468
1469 /***********************************************************************
1470  *           WaitForInputIdle   (USER32.577)
1471  */
1472 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1473 {
1474   FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1475
1476   return WAIT_TIMEOUT;
1477 }
1478
1479
1480 /***********************************************************************
1481  *           GetInputState32   (USER32.244)
1482  */
1483 BOOL WINAPI GetInputState(void)
1484 {
1485     MESSAGEQUEUE *queue;
1486     BOOL ret;
1487
1488     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1489         return FALSE;
1490     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1491     QUEUE_Unlock( queue );
1492
1493     return ret;
1494 }
1495
1496 /***********************************************************************
1497  *           UserYield  (USER.332)
1498  */
1499 void WINAPI UserYield16(void)
1500 {
1501     MESSAGEQUEUE *queue;
1502
1503     /* Handle sent messages */
1504     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1505
1506     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1507         QUEUE_ReceiveMessage( queue );
1508
1509     QUEUE_Unlock( queue );
1510
1511     /* Yield */
1512     if ( THREAD_IsWin16( THREAD_Current() ) )
1513         OldYield16();
1514     else
1515     {
1516         DWORD  count;
1517
1518        ReleaseThunkLock(&count);
1519        RestoreThunkLock(count);
1520     }
1521
1522     /* Handle sent messages again */
1523     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1524
1525     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1526         QUEUE_ReceiveMessage( queue );
1527
1528     QUEUE_Unlock( queue );
1529 }
1530
1531 /***********************************************************************
1532  *           GetMessagePos   (USER.119) (USER32.272)
1533  *
1534  * The GetMessagePos() function returns a long value representing a
1535  * cursor position, in screen coordinates, when the last message
1536  * retrieved by the GetMessage() function occurs. The x-coordinate is
1537  * in the low-order word of the return value, the y-coordinate is in
1538  * the high-order word. The application can use the MAKEPOINT()
1539  * macro to obtain a POINT structure from the return value.
1540  *
1541  * For the current cursor position, use GetCursorPos().
1542  *
1543  * RETURNS
1544  *
1545  * Cursor position of last message on success, zero on failure.
1546  *
1547  * CONFORMANCE
1548  *
1549  * ECMA-234, Win32
1550  *
1551  */
1552 DWORD WINAPI GetMessagePos(void)
1553 {
1554     MESSAGEQUEUE *queue;
1555     DWORD ret;
1556
1557     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1558     ret = queue->GetMessagePosVal;
1559     QUEUE_Unlock( queue );
1560
1561     return ret;
1562 }
1563
1564
1565 /***********************************************************************
1566  *           GetMessageTime   (USER.120) (USER32.273)
1567  *
1568  * GetMessageTime() returns the message time for the last message
1569  * retrieved by the function. The time is measured in milliseconds with
1570  * the same offset as GetTickCount().
1571  *
1572  * Since the tick count wraps, this is only useful for moderately short
1573  * relative time comparisons.
1574  *
1575  * RETURNS
1576  *
1577  * Time of last message on success, zero on failure.
1578  *
1579  * CONFORMANCE
1580  *
1581  * ECMA-234, Win32
1582  *
1583  */
1584 LONG WINAPI GetMessageTime(void)
1585 {
1586     MESSAGEQUEUE *queue;
1587     LONG ret;
1588
1589     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1590     ret = queue->GetMessageTimeVal;
1591     QUEUE_Unlock( queue );
1592
1593     return ret;
1594 }
1595
1596
1597 /***********************************************************************
1598  *           GetMessageExtraInfo   (USER.288) (USER32.271)
1599  */
1600 LONG WINAPI GetMessageExtraInfo(void)
1601 {
1602     MESSAGEQUEUE *queue;
1603     LONG ret;
1604
1605     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1606     ret = queue->GetMessageExtraInfoVal;
1607     QUEUE_Unlock( queue );
1608
1609     return ret;
1610 }